I've finished all the battles on both Legend and Hero and just finished up the Spoiled Tool Shop side mission. I am pretty sure I've done all the quests, missions, and I know I've cleared the entire story line. However in my unlockables (titles, ninja info card images) there are empty slots that say they will unlock when I clear the game. Yet they aren't unlocked.
My question is do I have to S rank everything in order to unlock everything? There are three boss battles I can't get above an A ranking to this point.
Otherwise this is my favorite game ever. I've been gaming since Pong came out and I've never played anything this long and to this level of completion.
Edit: Added label. Want to learn more about labels? Click here! -Super_Nova2k13